EP 0644403 A1 19950322 - Coriolis type mass flow meter.
Title (en)
Coriolis type mass flow meter.
Title (de)
Massendurchflussmessgerät nach dem Coriolis-Prinzip.
Title (fr)
Débitmètre fonctionnant selon le principe de Coriolis.
Publication
Application
Priority
JP 23515693 A 19930921
Abstract (en)
To achieve high precision measurement of mass flow rate by equalising the output amplitude values of upstream and downstream sensors without causing a lowering of the mechanical Q of the vibrating system , in a Coriolis type mass flow meter, one of the upstream and downstream sensors comprises a permanent magnet 2 mounted on a tube 15 and an induction coil 75, mounted on a base 3, the output voltage amplitude of the induction coil 75 being fixed. Another sensor comprises a ferromagnetic member 72 mounted on the tube 15 and a pair formed by an excitation coil 70 and an induction coil 71 mounted on the base 3. The output voltage amplitude of the induction coil 71 is controlled to be coincident with the output voltage amplitude of the induction coil 75 by adjusting a DC current flowing through the excitation coil 70. <IMAGE>
IPC 1-7
IPC 8 full level
G01F 1/84 (2006.01)
CPC (source: EP US)
G01F 1/8409 (2013.01 - EP US); G01F 1/8413 (2013.01 - EP US); G01F 1/8422 (2013.01 - EP US); G01F 1/8427 (2013.01 - EP US); G01F 1/8431 (2013.01 - EP US); G01F 1/8436 (2013.01 - EP US); G01F 1/8472 (2013.01 - EP US); G01F 1/849 (2013.01 - EP US)
Citation (search report)
- [A] WO 8600699 A1 19860130 - EXAC CORP [US]
- [A] EP 0262573 A2 19880406 - FLOWTEC AG [CH]
- [A] EP 0253504 A1 19880120 - SCHLUMBERGER ELECTRONICS UK [GB]
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0644403 A1 19950322; CA 2132554 A1 19950322; JP H0791999 A 19950407; US 5488870 A 19960206
DOCDB simple family (application)
EP 94306789 A 19940916; CA 2132554 A 19940921; JP 23515693 A 19930921; US 30726094 A 19940916